JPS6010267A - Image processor - Google Patents
Image processorInfo
- Publication number
- JPS6010267A JPS6010267A JP58118669A JP11866983A JPS6010267A JP S6010267 A JPS6010267 A JP S6010267A JP 58118669 A JP58118669 A JP 58118669A JP 11866983 A JP11866983 A JP 11866983A JP S6010267 A JPS6010267 A JP S6010267A
- Authority
- JP
- Japan
- Prior art keywords
- density
- original
- data
- amount
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 8
- 101100524645 Toxoplasma gondii ROM5 gene Proteins 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 12
- 238000004020 luminiscence type Methods 0.000 description 9
- 230000015572 biosynthetic process Effects 0.000 description 7
- 238000012937 correction Methods 0.000 description 5
- 238000005070 sampling Methods 0.000 description 4
- 108091008695 photoreceptors Proteins 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 238000012935 Averaging Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 101100087530 Caenorhabditis elegans rom-1 gene Proteins 0.000 description 1
- 101100305983 Mus musculus Rom1 gene Proteins 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000001739 density measurement Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
- G03G15/5025—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control by measuring the original characteristics, e.g. contrast, density
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Developing For Electrophotography (AREA)
- Control Of Exposure In Printing And Copying (AREA)
- Control Or Security For Electrophotography (AREA)
- Facsimile Scanning Arrangements (AREA)
- Facsimile Image Signal Circuits (AREA)
Abstract
Description
【発明の詳細な説明】 本発明は複写機、ファクス等の像形成装置に関する。[Detailed description of the invention] The present invention relates to an image forming apparatus such as a copying machine or a fax machine.
従来の複写装置におりては感光ドラムの感度に応じて原
稿照明用光源(以下光源という)の発光量制御を行なう
制御装置に加えて、さらに原稿濃度に応じて操作者が原
稿の濃度に応じた発光量を入力する手段を有するのが普
通である。In conventional copying machines, in addition to a control device that controls the amount of light emitted by a light source for document illumination (hereinafter referred to as a light source) according to the sensitivity of the photosensitive drum, an operator also controls the amount of light emitted by a light source for document illumination (hereinafter referred to as a light source) according to the sensitivity of the photosensitive drum. Usually, the device has a means for inputting the amount of light emitted.
このような半自動的(11ぼ手薄に近い)においては適
切な発光量を選ぶのは至碓の業で%適切なコントラスト
を有するコピーを得るためにはしげしげ何枚か試し焼き
を行ない高価なコピー用紙を無駄にしなければならなか
った。In such a semi-automatic machine (nearly 11 degrees weak), selecting the appropriate light output is a matter of course, and in order to obtain a copy with the appropriate contrast, it is necessary to test print several copies and make expensive copies. Had to waste paper.
このような問題を解決するために原稿濃度を光検知手段
や感光ドラムの表面電位計などを用いて検出し、これに
応じて発光量を自動制御する機能(AEi)を備えた複
写機も提案されているが、発光量を検出された原S濃+
i(に対して(すなわちコピー濃度)どのように応答さ
せればユーザーの需要に応えられるかを真剣に検討した
跡が見えるものは少なく、冬〈は検出原稿濃度と発光量
を直り的に対応させて事足i1りとしている。このよう
な自動露光の複写機では高濃度の原稿に対しては発光量
を多く、低濃度の原稿に対しては逆に少なくするように
、すなわち黒っぽい原着は白目に白っぽい原稿は黒目に
コピーするように制御するのが普通だが、上記のように
濃度−発光量を直線的に対応させると黒っぽいコピーお
よび白っぽいコピーが必甥なニーデーの要求には答える
ことができなかった。To solve this problem, we proposed a copying machine equipped with a function (AEi) that detects the density of the original using a photodetector or a photosensitive drum surface electrometer, and automatically controls the amount of light emitted accordingly. However, the amount of luminescence detected is
There are few that show any evidence of serious consideration of how to respond to i (i.e., copy density) to meet user demands, and Winter's work simply deals with the density of the detected original and the amount of light emitted. In such automatic exposure copiers, the amount of light emitted is increased for high-density originals, and decreased for low-density originals. Normally, a document with whitish whites is controlled to be copied with blacks, but if the density and luminescence amount are linearly correlated as described above, it will meet the needs of those who need blackish copies and whitish copies. I couldn't do it.
又オリジナルの一部分の濃度を提出して発光量を決定す
ることがあり、不正、′Cであった。In addition, there were cases in which the luminescence amount was determined by submitting the density of a portion of the original, which was fraudulent.
又オリジナルの全域の濃11cを検出することが考えら
れるが、その場合適正出力をめて、像形成金1−1M始
するには時間がかかりすぎた。It is also possible to detect the darkness 11c over the entire area of the original, but in that case, it would take too much time to set up the appropriate output and start forming the image 1-1M.
又複写倍率が変っても感光面の光を一定光とすべく露光
の絞ヤを調節するものがあるが、オリジナル濃度及び倍
率を考慮した絞シ調節は困難である。Furthermore, there are devices that adjust the exposure aperture in order to keep the light on the photosensitive surface constant even when the copying magnification changes, but it is difficult to adjust the aperture in consideration of the original density and magnification.
本発明は上述の従来装置の欠点を除去することを目的と
する。The present invention aims to obviate the drawbacks of the prior art devices mentioned above.
又各種オリジナル#度に対して適切な濃度およびコント
ラストを得ることができる像形成装置を提供することを
目的とする。Another object of the present invention is to provide an image forming apparatus that can obtain appropriate density and contrast for various original degrees.
又本発明は、特に黒っぽいオリジナル又は白っぽいオリ
ジナルに対しては可能な限り忠実に再現する像形成装置
を目的とする。It is also an object of the present invention to provide an image forming apparatus that reproduces dark or whitish originals as faithfully as possible.
又本発明は、像形成のだめの芽すジナル露光中に濃度調
整が自動的にできる像形成装置にあ勺、
又本発明け、部分的にオリジナル濃度が変化しても対応
できる像形成装置にあル。The present invention also provides an image forming apparatus that can automatically adjust the density during the original exposure, where the problem of image formation occurs. Ah.
又本発明は、オリジナル全域の濃度測定完了前に像形成
開始できる像形成装置にあり、又本発明は、変倍像形成
等の特殊処理に対応して適切なa度の像形成ができる像
形成にある。The present invention also resides in an image forming apparatus that can start forming an image before the density measurement of the entire original area is completed. In formation.
又高m度、高信頼度な像形成ができる複写機にある。Also, it is a copying machine that can form images with high precision and high reliability.
明らか。clear.
ハ 以下1図面に基づいて本発明の詳細な説明する。Ha The present invention will be described in detail below based on one drawing.
第1図に本発明の複写機の模式図を示す。この複写機の
構造は公知のもので、複写啼、には原稿11に沿って移
動する光源12より発されて原稿台上の原稿11bら反
射した光は各ミラー13を介して感光ドラム10(矢印
方向に回転する)上に結像する。チャージャ14によシ
帯電されたドラムは、この露光により静!、潜像が〈ク
リーナ17によりクリーニングされて再び帯電、露光が
なされる。FIG. 1 shows a schematic diagram of a copying machine of the present invention. The structure of this copying machine is known. During copying, light is emitted from a light source 12 moving along the original 11 and reflected from the original 11b on the original table via each mirror 13 to the photosensitive drum 10 ( (rotate in the direction of the arrow). The drum charged by the charger 14 becomes static due to this exposure! , the latent image is cleaned by a cleaner 17 and charged and exposed again.
図中本発明に係る一度検出手段として光源12近傍に設
けられた光(倉知手段Inおよび感光ドラム10近傍に
設けられた表面電位計1bが図示されている。本発明で
け原稿の濃度の検出には以上の2つのうちのどちらを用
いてもよく、また、2つと本川いてもかすわない。ただ
し、光検知手段1aは原稿11からの反射光量を検出し
、表面電位計1bは感光後の感光ト°ラム10の表面電
位を検出することによりオリジナルの濃度検出を行なう
ものである。In the figure, a light (Kurachi means In) provided near the light source 12 and a surface electrometer 1b provided near the photosensitive drum 10 are shown as detection means according to the present invention. Either of the above two methods may be used, and there is no problem even if both of them are used.However, the light detection means 1a detects the amount of light reflected from the original 11, and the surface electrometer 1b detects the amount of light reflected from the original 11. The density of the original is detected by detecting the surface potential of the subsequent photosensitive drum 10.
尚オリジナル露光域外に標準白板18を設け、像形成開
始前にこれをランプ12で照射してその反射光を検知器
1a又はその反射光による電位を電位計1bにより測定
して測定値が標準値にあるか否かを判断して、標準値に
ない場合性標準値にガる様、ランプ12又はチャージャ
14を制御する。それにより装置を標準状態に予じめセ
ットすることができる。それによって像形成開始後の再
生濃#にの適正制御を高1lFi?度に達成できる。こ
の標準化プロセスは、装置のパワースイッチの投入後、
像形成スタートスイッチ(コピーキー)の投入以前に実
行するととができる。それにより像形成の立上り時間を
節約できる。A standard white plate 18 is provided outside the original exposure area, and before the start of image formation, it is irradiated with a lamp 12 and its reflected light is measured with a detector 1a or the potential due to the reflected light is measured with an electrometer 1b, and the measured value is the standard value. If the value is not within the standard value, the lamp 12 or charger 14 is controlled so as to return to the standard value. This allows the device to be preset to standard conditions. This allows appropriate control of the reproduction density after the start of image formation to a high 1lFi? can be achieved once. This standardization process begins after the device is powered on.
This can be done if executed before the image formation start switch (copy key) is turned on. This saves image formation start-up time.
第2図は本発明の複写機の露光量制御系のブロック図で
、図においては上記の原@濃度検出手段1 (Ia、1
b)の出力はA / D変換器2でデジタル化され入出
力ボート3を介して0PU4に送られるよう構成しであ
る。0PU4は、この送られて来た濃度データの積分値
によりROM (リードオンリメモリ)5に格納された
後述する濃度〜発光量を対応させたデータテーブルを、
参照して発光量データを決定し、とれを入出力ボート3
へ送る。第6図に検出値を積分する回路例を示す。10
1け光又は電イユセンサ、102は増巾用オペアンプ、
1o3けレベル調整用アンプ、104は積分リセット用
スイッチである。梼分時間iA/Dコンバータによる。FIG. 2 is a block diagram of the exposure amount control system of the copying machine of the present invention.
The output of b) is digitized by the A/D converter 2 and sent to the 0PU4 via the input/output port 3. The 0PU 4 stores a data table in which density corresponds to luminescence amount, which will be described later, and is stored in the ROM (read-only memory) 5 based on the integrated value of the sent density data.
Refer to it to determine the luminescence amount data, and input and output the data to the input/output boat 3.
send to FIG. 6 shows an example of a circuit for integrating detected values. 10
1 light or electric sensor, 102 operational amplifier for increasing width,
103 is a level adjustment amplifier, and 104 is an integral reset switch. Based on minute time iA/D converter.
コンバート時間で決まる。これはオリジナルをブリスキ
ャンして領域の濃度を検出して平均化して適正出方をめ
る場合に有効である。この発光量データけD / A変
換器6でアナログ化さiまた光源12へ送出サレ、光R
12の発光量が制御さゎ渇摺成である。Determined by conversion time. This is effective when blisscanning the original to detect the density of the area and averaging it to determine the appropriate appearance. This light emission amount data is converted into analog data by the D/A converter 6 and then sent to the light source 12.
12, the amount of light emitted is controlled.
濃度〜発光量のデータはROM5に一定の特性曲線を構
成してたとえば8ビツトの情報とじて格納しておく。即
ち8ビツト分っまシタ5乙通勺のアドレスの各アドレス
に発光量のデータが例LId各々8ビットで格納される
。各アドレスは検出濃度の各データに対応する。つまり
検出積分a度データに一対応するメモリアドレスをみつ
けてそのアドレスに格納の発光量データを出力スル。R
OM5はデータ変更可能なRAMでもいい。The data from concentration to luminescence amount is stored in the ROM 5 as a constant characteristic curve, for example, as 8-bit information. That is, the data of the amount of light emission is stored in each of the addresses of 8 bits each in 8 bits for each LId. Each address corresponds to each data of detected concentration. In other words, it finds a memory address that corresponds to the detected integral a degree data and outputs the light emission amount data stored at that address. R
OM5 may be a RAM whose data can be changed.
以下に濃度〜発光量の特性曲線の例を示す。An example of a characteristic curve of concentration versus luminescence amount is shown below.
原稿のa度を真黒から真白までを161〜Ai1の11
段階に分け、(真黒: A 1 、真白:J<11)第
3図(A)に実線で示すように原稿濃度が存在得られる
ことになる。以下コピーの濃度を破線で、原稿a度を実
線で示す。すなわち、第3図(A)の場合は破線と実線
は重なっている。)まず考えられるのはこのようなfn
tw分布の原稿全てを複写したときに自動的にそのどれ
もが同一のfiA度に仕上るように発光量制御を行なう
方法である。第3図(B)に破線でこのときのコピーの
仕上シ濃度を示す。すなわち161(真黒)の原稿もA
11(真白)の原稿も全て同一濃度で仕上ることになる
。The a degree of the original from pure black to pure white is 161 to 11 of Ai1.
By dividing the image into stages (pure black: A 1 , pure white: J<11), the original density can be obtained as shown by the solid line in FIG. 3(A). Hereinafter, the density of the copy is shown by a broken line, and the degree of the original is shown by a solid line. That is, in the case of FIG. 3(A), the broken line and the solid line overlap. ) The first thing to think of is fn like this
This is a method of controlling the amount of light emitted so that when all originals with tw distribution are copied, they are all automatically finished with the same fiA degree. In FIG. 3(B), the finished density of the copy at this time is shown by a broken line. In other words, the original of 161 (pure black) is also A.
11 (pure white) originals will all be finished with the same density.
しかし、白紙原稿も黒い紙も同じ濃度で仕上るというこ
とは現実的に見て意味がないので、本発明では第3図(
0)に示すように166近辺の中間濃度の原稿に対して
は破線の如く同一濃度のコピーが得られるように発光量
を制御し、残りの高#塵は白目に低濃度は黒目に仕上る
ようにするようにすればよい。However, it is practically meaningless to finish both the blank original and the black paper with the same density, so in the present invention, as shown in Fig. 3 (
As shown in 0), for originals with medium density around 166, the amount of light emitted is controlled so that copies with the same density are obtained as shown by the broken line, and the remaining high ## dust is made into white and low density is made into black. All you have to do is make it .
しかし、まだ第3図(c)の例では実際には真黒な原稿
は完全に黒くコピーできず、真白な原稿も完全に白くは
仕上らない。そこでさらに第ように制御するのが望まし
い。However, in the example shown in FIG. 3(c), a completely black original cannot be copied completely black, and a completely white original cannot be copied completely white. Therefore, it is desirable to perform further control in the following manner.
さらに、ある一点から急にコピー饋度が変るようでは不
便であるから、第3図(E)のように曲線で原稿濃度〜
コピー濃度が対応するようにすれは理想的である。さら
にこれを使用する感光ドラム10の感度に応じて補正し
た例が第3図(F)である。Furthermore, since it would be inconvenient if the copying speed suddenly changes from a certain point, the original density is
Ideally, the copy densities should match. Further, an example in which this is corrected according to the sensitivity of the photosensitive drum 10 used is shown in FIG. 3(F).
以上の第3図(A)〜(F)に示したコピー濃度を得る
ためには、ム’c4図(A)〜(F)にそれぞれ示すよ
うに発光量を制御することになる。すなわち、本発明で
は第4図(C)〜(F)に示すように原稿濃度〜発光量
は非線型で、中間濃IW付近ではほぼ同一のコピー濃l
現となるように渭走い目の原稿については発光量を多く
、逆に薄目の原稿については発光量を少なく制御する。In order to obtain the copy densities shown in FIGS. 3(A) to 3(F), the amount of light emitted is controlled as shown in FIGS. 4(A) to 4(F), respectively. That is, in the present invention, as shown in FIGS. 4(C) to (F), the original density to light emission amount is non-linear, and near the intermediate density IW, the copy density is almost the same.
As shown in the table below, the amount of light emitted is controlled to be high for documents with a straight edge, and the amount of light emitted is controlled to be decreased for documents that are thin.
以上に詳述したような原f11濃度〜発光量を関係づけ
た非線型の特性曲線をROM5に格納しておき、こ第1
を0PU4が参照することによシ発光量の制御が行なわ
れる。この処理手順をフローチャート図にすると第5図
のようになる。すなわち、苗5図ステップ1においては
光検知手段1aあるいは表面電位計1bなどによる原稿
濃度検出手段1の出力の積分値はA / D変換器2を
介して入出力ボート3から0PU4にロードされる。査
売いてステップ2においてOP UJt 、この送られ
て来た濃度データとROI15中にデジタル化されて格
納された前記のハ度〜さ+%光景の特性曲線のアドレス
とを比較することにより発光量データを決定しつまり濃
度データをアドレスデータとしてメモリをアドレシング
して発光量データを出力し、次にステップ3でこの発光
量データをCPHにロードする。そしてステップ4でこ
の発光量データを入出力ボート3を介してD/A変換器
6に送られ、ここでアナログ奇に戻された発光域データ
にしたがって光源12の発光量の制御がたとえばランプ
12の印加電圧の制御などKよシ行なわれる。尚現像器
15の現像バイアス電圧を制御することも可能である。The non-linear characteristic curve relating the original f11 concentration to the luminescence amount as detailed above is stored in the ROM 5, and the first
The amount of light emitted is controlled by the 0PU4 referring to the 0PU4. This processing procedure is illustrated in a flowchart as shown in FIG. That is, in step 1 of the seedling 5 diagram, the integral value of the output of the document density detection means 1 using the light detection means 1a or the surface electrometer 1b is loaded from the input/output boat 3 to the 0PU4 via the A/D converter 2. . After that, in step 2, the amount of luminescence is determined by comparing the sent concentration data with the address of the characteristic curve of the above-mentioned intensity + % sight, which is digitized and stored in the ROI 15. The data is determined, the density data is used as address data, and the memory is addressed to output the light emission amount data. Next, in step 3, this light emission amount data is loaded into the CPH. Then, in step 4, this light emission amount data is sent to the D/A converter 6 via the input/output port 3, and the light emission amount of the light source 12 is controlled, for example, by the lamp 12, in accordance with the light emission area data returned to analog form. Control of the applied voltage, etc., is carried out by K. Note that it is also possible to control the developing bias voltage of the developing device 15.
第7図位第5図のフローを更に詳述したもので、S10
にて、マイクロブロセ丈CPUはI10ボート5の所定
ボートをセンスし、センスデータa(検出積分濃度)を
CPU中のレジスタの1つにロードし、S11にてRO
MのLmアドレスbをOPUのアドレスレジスタにロー
ドし、1912ニて先のデータaと先頭アドレスデータ
bとを加にてデータCをI10ポートにセットして、制
御データを出力する。Figure 7 is a more detailed explanation of the flow in Figure 5, S10
At S11, the microblossom CPU senses a predetermined port of I10 boat 5, loads sense data a (detected integrated concentration) into one of the registers in the CPU, and loads the RO at S11.
The Lm address b of M is loaded into the address register of the OPU, and in 1912, the previous data a and the first address data b are added to set data C to the I10 port, and control data is output.
次に他の例、即ち原稿での反射光がレンズを介して感光
体上に結像される光学系の光路中に、受光素子を設置し
、′I)1.写倍率の変化によシ感光体ドラム上の照度
と受光素子の出力とのズレを複写倍率に応じて補正し、
さらに補正されたデータに応じて現像バイアスf:制御
して複写濃度を適正にする例を説明する。Next, in another example, a light receiving element is installed in the optical path of an optical system in which light reflected from an original is imaged on a photoreceptor via a lens, 'I)1. Corrects the discrepancy between the illuminance on the photoreceptor drum and the output of the light receiving element due to changes in the copying magnification according to the copying magnification,
Furthermore, an example will be described in which the developing bias f is controlled in accordance with the corrected data to make the copy density appropriate.
iB図は第1図と同様のものである。Figure iB is similar to Figure 1.
コピー開始ボタンが押されると第1ミラー104と第2
第3ミラー105は2:1の速度比で原稿101を走査
し始める。光量検知手段107は走査中、一定の間隔ご
とに光量を測定し、データのサンプリングをする。A、
B、O,D、とal bl C1dは、原稿の位置とド
ラム上に原稿像ができる位置の対応を示す。When the copy start button is pressed, the first mirror 104 and the second
The third mirror 105 begins to scan the original 101 at a speed ratio of 2:1. The light amount detection means 107 measures the amount of light at regular intervals during scanning and samples data. A,
B, O, D, and al bl C1d indicate the correspondence between the position of the original and the position where the original image is formed on the drum.
第2図はサンプリング後、平均化と変倍処理を行って現
像バイアスを決定する手順を示したフロー図であり、
ffi i O、11図はそれを達成する回路図、第1
2図はbc 10図のプログラムFtOMOに格納の上
記手11Qプログラムのフローチャートである。第11
図の0PU40はA/Dコンバータ内蔵のCPUである
。FIG. 2 is a flow diagram showing the procedure for determining the developing bias by averaging and scaling processing after sampling.
ffi i O, Figure 11 is the circuit diagram to achieve it, the first
Figure 2 is a flowchart of the above hand 11Q program stored in the program FtOMO of Figure bc10. 11th
0PU40 in the figure is a CPU with a built-in A/D converter.
第10図は電気的構成図である。サンプリングされたデ
ータはAρコンバータを介してデジタル化されRAMの
アドレス空間に順次割#)撮られて記憶される。露光に
ょ)感光体ドラム上に形成された潜像が現像器の位j1
まで来る間にデータを平均化し、そのデータに応じて現
像バイアスを制御する。EJT alにおいて現像器1
10はb点の現像を行なっているが、この時の現像バイ
アスの値を、原稿のA、Oの間に0.1%eQ毎N回サ
ンプリングしたデータを用いて平均化し、その値に従っ
て決定している。次に0点の現像が開始される時には、
原稿B、Dの間にて受光;51oyでサンプリングした
データ(Nコ)を平均化しく第13図参照)その値に従
って現像バイアスのDo酸成分制御する。このように順
次現像バイアスのDC成分の制御が行なわれる。FIG. 10 is an electrical configuration diagram. The sampled data is digitized via an Aρ converter, sequentially divided into RAM address spaces, and stored. Exposure) The latent image formed on the photoreceptor drum is at the position j1 of the developing device.
During this time, the data is averaged and the developing bias is controlled according to that data. Developer unit 1 in EJT al
10 is developing at point b, and the value of the developing bias at this time is averaged using data sampled N times every 0.1% eQ between A and O of the original, and determined according to that value. are doing. Next time the development of point 0 starts,
Light is received between originals B and D; the data (N pieces) sampled at 51 oy are averaged (see FIG. 13), and the Do acid component of the developing bias is controlled according to that value. In this way, the DC component of the developing bias is sequentially controlled.
倍率が異なる時の出力補正は平均化した値に補正ROM
からの補正値をかけ合わせて行なう。Output correction when magnification differs is based on the averaged value Correction ROM
This is done by multiplying the correction values from .
サンプリングの仕方についてはy、alの面に周期的(
例えば0.1 sec )に割−り込み信号を入れてザ
ブリングデータをRAMのアドレス空間にストアするこ
とにより行なう。Regarding the sampling method, periodic (
For example, this is done by inputting an interrupt signal every 0.1 sec) and storing the Zabring data in the address space of the RAM.
第11図の115,116は第6図の積分回路と同様の
ものであシ、1113,120は各々D/A変換器6を
材成する積分回路とバッファアンプである。115 and 116 in FIG. 11 are similar to the integrating circuit in FIG. 6, and 1113 and 120 are an integrating circuit and a buffer amplifier that constitute the D/A converter 6, respectively.
119は現像ローラ110にバイアス電圧を付与するト
ランスである。A transformer 119 applies a bias voltage to the developing roller 110.
第12.13図を詳述する。入力パルスにょ勺割込みが
かかると、入力ボートAD1のデータORQをCPU中
のレジスタAにロードする(ステップ1)、サンプル回
敬を示すレジスタCを+1する(ステップ2)、RAM
アドレスを示すレジスタHDをセンスしてRAMの先程
アドレスにレジスタAのデータをストアする(ステップ
3)。Figure 12.13 is detailed. When an input pulse interrupt occurs, data ORQ of input port AD1 is loaded into register A in the CPU (step 1), register C indicating sample return is incremented by 1 (step 2), and RAM
The register HD indicating the address is sensed and the data of the register A is stored at the previous address in the RAM (step 3).
末だN回サンプルしていないので、レジスタHDのアド
レスデータを1つ進める(ステップ4−2)再び次の0
.I Sec後のパルスにより 回mノサンプリングと
データ格納を行々う。Since the sample has not been completed N times, the address data in the register HD is advanced by one (step 4-2).
.. Sampling and data storage are performed m times by the pulse after I Sec.
サンプル回数がNに達すると、つまりA−Cデ
間のサンプルが終ると、RAM中のNヶのシータを加算
してレジスタA、Bにセットする(ステップ4−15)
。加算データを1/N してレジスタAにロード(ステ
ップ6)。ROM I K予じめコヒー倍率に応じた補
正データが入っているので、現在の倍率におけるデータ
をROMjからレジスタBにロードする(ステップ7)
。レジスタAとBとのデータをかけてAにロード(ステ
ップ8)。このレジスタAのデータによりROM 2f
lドレスして、該当アドレスに格納のバイアスデータを
レジスタBにロード(ステップ9)。When the number of samples reaches N, that is, when the sampling between A and C ends, the N theta values in the RAM are added and set in registers A and B (step 4-15).
. Addition data is 1/N and loaded into register A (step 6). ROM I K contains correction data according to the cohesive magnification in advance, so load the data at the current magnification from ROMj to register B (step 7).
. Multiply the data in registers A and B and load into A (step 8). This register A data causes ROM 2f
1 address and load the bias data stored at the corresponding address into register B (step 9).
レジスタBのデータをボート0.から出力しjN、像バ
イアスとする(ステップ10)。次にレジスタCにy7
2をロードし再び次の領域(0,D)のサンプリング(
但しN/2回)とデー※格納を行グ
なう。RAMにはステップ!1〜5によりV2のデ△
−タが新たに格納されるが、ステップ5〜6においては
Nヶのデータつまり、B=D分のデータを演算して平均
値をめる。従って受光素子からのデータの前後のデータ
に渡って平均化するので、精度が良い。尚受光素子10
7はズームレンズ106の後部非画部に設けらねる。こ
のズームレンズは倍率選択の入カキ−によυズーミング
動作する。そしてこの入カキ−によるラッチデータによ
jj) ROM 1のアドレリングがなされて、補正デ
ータが得らする。尚電位計を露光ステーション直後の位
吋に設けても上述の如きノ(イアス制御ができる。Transfer the data in register B to boat 0. jN, which is used as the image bias (step 10). Then add y7 to register C.
2 and sample the next area (0, D) again (
However, data is stored (N/2 times). Step to RAM! In steps 1 to 5, data Δ - of V2 is newly stored, but in steps 5 to 6, N pieces of data, that is, data for B=D, are calculated and an average value is calculated. Therefore, since the data before and after the data from the light receiving element are averaged, the accuracy is high. Note that the light receiving element 10
7 is provided in the rear non-image area of the zoom lens 106. This zoom lens performs υ zooming operation using the input key for magnification selection. Then, addressing of ROM 1 is performed using the latch data generated by this input key, and correction data is obtained. It should be noted that even if an electrometer is installed at a position immediately after the exposure station, the above-mentioned irradiation control can be performed.
これらの例により像形成の為の像露光中に即オート濃度
制御ができ、ムダ時間を少なくできる。With these examples, automatic density control can be performed immediately during image exposure for image formation, and wasted time can be reduced.
又本例はオリジナルイメージをOOD浄の読取手段によ
り読取って電気信号に変換し、更に2値のビデオ信号に
変換して、そのビデオ信号によりレーザを輝度変n■し
てドラムに潜像を形成又はそのビデオ信号を伝送する装
置においても適用できる。その場合オリジナルのn t
Kはオリジナルイメージ読取手段により兼用して検知す
る。オリジナル読取データからオリジナル濃度を判定す
る。又制御される像形成条件の1つは、上記読取データ
の2値化処理ステツプとすることもテfiる。つまり2
値化の為のスレシホールドレベルを判定濃度に応じて変
化させることによりそれができる。In addition, in this example, the original image is read by an OOD reader and converted into an electrical signal, which is further converted into a binary video signal, and the video signal changes the brightness of the laser to form a latent image on the drum. Alternatively, the present invention can also be applied to a device that transmits the video signal. In that case, the original n t
K is also detected by the original image reading means. Determine original density from original read data. It is also possible that one of the image forming conditions to be controlled is the binarization processing step of the read data. In other words, 2
This can be done by changing the threshold level for value conversion according to the judgment density.
第1図は本発明における複写機の概略tと成を示す断面
図、第2図は複写機の制御回路を示すブロック図、第3
図(A)〜(F)は本発明の、原稿a)現とコピー濃度
の対応を示す線図、第4図(A)〜(IF)は本発明の
原稿濃I地〜発光号の特性を示す線図、IIJ51Ml
−1第2図の回路の処理手順を示すフローチャート図、
第6図は、第1図の困
検知手段を有する積分回路7、第7図は第5図の詳細フ
ローチャート、第8図は他の例を示す複写機断面図、第
9図は他の例のフローチャート図、第10.11図は他
の例の回路クロック図、第12図は第9図の詳細フロー
チャー)、M13図は第12図の制御説明図である。図
中1は濃度検出手段、4は制御手段、12けランプ、1
5は現像手段である。
第5図
第7目
第9図
篤lO図
第11目FIG. 1 is a sectional view showing the outline and configuration of a copying machine according to the present invention, FIG. 2 is a block diagram showing a control circuit of the copying machine, and FIG.
Figures (A) to (F) are diagrams showing the correspondence between original density (a) and copy density of the present invention, and Figures 4 (A) to (IF) are characteristics of the original dark I background to light signal of the present invention. Diagram showing IIJ51Ml
-1 A flowchart diagram showing the processing procedure of the circuit in Fig. 2,
FIG. 6 shows the integration circuit 7 having the problem detection means shown in FIG. 1, FIG. 7 is a detailed flowchart of FIG. 5, FIG. 8 is a sectional view of a copying machine showing another example, and FIG. 9 is another example. 10.11 is a circuit clock diagram of another example, FIG. 12 is a detailed flowchart of FIG. 9), and FIG. M13 is a control explanatory diagram of FIG. 12. In the figure, 1 is a concentration detection means, 4 is a control means, 12 lamps, 1
5 is a developing means. Figure 5 Item 7 Figure 9 Atsushi Figure 11
Claims (1)
リジナル濃度を検出する手段と、上記検出手段の出力に
よりプロセス手段の処理条件を制御する手段と、上記制
御手段は上記検出手段からの検出信号を、露光ステーシ
ョンから露光像処理ステーションに至る間で演算して制
御信号を出方することを特徴とする像処理装置。a process means for imagewise exposing a medium and processing a received light image; a means for detecting the original density; a means for controlling processing conditions of the process means based on the output of the detection means; An image processing apparatus characterized in that a signal is calculated between an exposure station and an exposure image processing station to output a control signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58118669A JPS6010267A (en) | 1983-06-30 | 1983-06-30 | Image processor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58118669A JPS6010267A (en) | 1983-06-30 | 1983-06-30 | Image processor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6010267A true JPS6010267A (en) | 1985-01-19 |
JPH0555867B2 JPH0555867B2 (en) | 1993-08-18 |
Family
ID=14742279
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58118669A Granted JPS6010267A (en) | 1983-06-30 | 1983-06-30 | Image processor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6010267A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62289866A (en) * | 1986-06-09 | 1987-12-16 | Canon Inc | Image density regulating device |
US4910554A (en) * | 1987-03-31 | 1990-03-20 | Sharp Kabushiki Kaisha | Copying apparatus provided with an automatic light exposure control system |
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JPS53134437A (en) * | 1977-04-28 | 1978-11-24 | Canon Inc | Exposing apparatus |
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JPS5691259A (en) * | 1979-12-26 | 1981-07-24 | Toshiba Corp | Image control device |
JPS5699553U (en) * | 1979-12-27 | 1981-08-06 | ||
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JPS56101157A (en) * | 1979-10-22 | 1981-08-13 | Nashua Corp | Automatic bias and match control unit for electrophotographic copier |
JPS56110961A (en) * | 1980-02-07 | 1981-09-02 | Toshiba Corp | Exposure device of electrophotographic copier |
JPS56140361A (en) * | 1980-04-02 | 1981-11-02 | Toshiba Corp | Electrophotographic copier |
JPS5720765A (en) * | 1980-07-15 | 1982-02-03 | Ricoh Co Ltd | Controller for copying |
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JPS57119367A (en) * | 1981-01-17 | 1982-07-24 | Ricoh Co Ltd | Controller for copying image quality |
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JPS58106572A (en) * | 1981-12-21 | 1983-06-24 | Fuji Xerox Co Ltd | Automatic exposing device of electronic copying machine |
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1983
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JPS5393835A (en) * | 1977-01-28 | 1978-08-17 | Ricoh Co Ltd | Copy picture quality controller of electrostatic copying machine |
JPS53105229A (en) * | 1977-02-25 | 1978-09-13 | Ricoh Co Ltd | Plural sheet copying method |
JPS53134437A (en) * | 1977-04-28 | 1978-11-24 | Canon Inc | Exposing apparatus |
JPS5433037A (en) * | 1977-08-18 | 1979-03-10 | Ricoh Co Ltd | Electro photographic device |
JPS5462833A (en) * | 1977-10-28 | 1979-05-21 | Canon Inc | Controlling method of original exposure |
JPS5486353A (en) * | 1977-12-22 | 1979-07-09 | Canon Inc | Recorder |
JPS5499632A (en) * | 1978-01-24 | 1979-08-06 | Ricoh Co Ltd | Image adjusting method of copying machines |
JPS5574564A (en) * | 1978-11-30 | 1980-06-05 | Ricoh Co Ltd | Bias device of variable-power copying machine |
JPS5611466A (en) * | 1979-07-09 | 1981-02-04 | Ricoh Co Ltd | Electrophotographic copier using belt photoreceptor |
JPS56101157A (en) * | 1979-10-22 | 1981-08-13 | Nashua Corp | Automatic bias and match control unit for electrophotographic copier |
JPS5667856A (en) * | 1979-11-07 | 1981-06-08 | Konishiroku Photo Ind Co Ltd | Ground color detector of original in copying machine |
JPS5689752A (en) * | 1979-12-22 | 1981-07-21 | Ricoh Co Ltd | Copying machine |
JPS5691259A (en) * | 1979-12-26 | 1981-07-24 | Toshiba Corp | Image control device |
JPS5699553U (en) * | 1979-12-27 | 1981-08-06 | ||
JPS5699552U (en) * | 1979-12-27 | 1981-08-06 | ||
JPS56110961A (en) * | 1980-02-07 | 1981-09-02 | Toshiba Corp | Exposure device of electrophotographic copier |
JPS56140361A (en) * | 1980-04-02 | 1981-11-02 | Toshiba Corp | Electrophotographic copier |
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JPS57119367A (en) * | 1981-01-17 | 1982-07-24 | Ricoh Co Ltd | Controller for copying image quality |
JPS57151953A (en) * | 1981-03-16 | 1982-09-20 | Ricoh Co Ltd | Controlling method for development bias voltage of copying machine |
JPS58106572A (en) * | 1981-12-21 | 1983-06-24 | Fuji Xerox Co Ltd | Automatic exposing device of electronic copying machine |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62289866A (en) * | 1986-06-09 | 1987-12-16 | Canon Inc | Image density regulating device |
US4910554A (en) * | 1987-03-31 | 1990-03-20 | Sharp Kabushiki Kaisha | Copying apparatus provided with an automatic light exposure control system |
Also Published As
Publication number | Publication date |
---|---|
JPH0555867B2 (en) | 1993-08-18 |
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